Question

explain the type of weathering along with example​

Answer 1

Answer:

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Explanation:

Weathering

Weathering is the breaking down of rocks,

soils, and minerals as well as wood and

artificial materials through contact with the

Earth's atmosphere, water, and biological

organisms. Weathering occurs in situ (i.e.,

on site, without displacement), that is, inthe same place, with little or no movement,

and thus should not be confused with

erosion, which involves the transport of

rocks and minerals by agents such as

water, ice, snow, wind, waves and gravity

and then being transported and deposited

in other locations.Two important classifications of

weathering processes exist – physical and

chemical weathering; each sometimes

involves a biological component.

Mechanical or physical weatheringinvolves the breakdown of rocks and soils

through direct contact with atmospheric

conditions, such as heat, water, ice and

pressure. The second classification,

chemical weathering, involves the direct

effect of atmospheric chemicals or

biologically produced chemicals also

known as biological weathering in the

breakdown of rocks, soils and minerals.

[1]

While physical weathering is accentuated

in very cold or very dry environments,

chemical reactions are most intense wherethe climate is wet and hot. However, both

types of weathering occur together, and

each tends to accelerate the other. For

example, physical abrasion (rubbing

together) decreases the size of particles

and therefore increases their surface area,

making them more susceptible to

chemical reactions. The various agents act

in concert to convert primary minerals

(feldspars and micas) to secondary

minerals (clays and carbonates) andrelease plant nutrient elements in soluble

forms.

The materials left over after the rock

breaks down combined with organic

material creates soil. The mineral content

of the soil is determined by the parent

material; thus, a soil derived from a single

rock type can often be deficient in one or

more minerals needed for good fertility,

while a soil weathered from a mix of rock

types (as in glacial, aeolian or alluvialsediments) often makes more fertile soil.

In addition, many of Earth's landforms and

landscapes are the result of weathering

processes combined with erosion and re-

deposition.

Physical weathering, also called

mechanical weathering or disaggregation,

is the class of processes that causes the

disintegration of rocks without

important mechanism in deserts, where

there is a large diurnal temperature range,hot in the day and cold at night.

[3] The

repeated heating and cooling exerts stress

on the

gradient can be understood in terms of

stress or of strain, equivalently. At some

point, this stress can exceed the strength

of the material, causing a crack to form. Ifnothing stops this crack from propagating

occurs formed by the

weathering of wave actions

In pressure release, also known as

unloading, overlying materials (not

necessarily rocks) are removed (by

erosion, or other processes), which causes

underlying rocks to expand and fracture

parallel to the surface.Intrusive igneous rocks (e.g. granite) are

formed deep beneath the Earth's surface.

They are under tremendous pressure

because of the overlying rock material.

When erosion removes the overlying rock

material, these intrusive rocks are exposed

and the pressure on them is released. The

outer parts of the rocks then tend to

expand. The expansion sets up stresses

which cause fractures parallel to the rock

surface to form. Over time, sheets of rock

break away from the exposed rocks alongthe fractures, a process known as

exfoliation. Exfoliation due to

Chemical weathering

Chemical weathering changes the

composition of rocks, often transforming

them when water interacts with minerals to

create various chemical reactions.

Chemical weathering is a gradual andongoing process as the mineralogy of the

rock adjusts to the near surface

environment. New or secondary minerals

develop from the original minerals of the

rock. In this the processes of oxidation

and hydrolysis are most important.

Chemical weathering is enhanced by such

geological agents as the presence of

water and oxygen, as well as by such

biological agents as the acids produced by

microbial and plant-root metabolism.The process of mountain block uplift is

important in exposing new rock strata to

the atmosphere and moisture, enabling

important chemical weathering to occur;

significant release occurs of Ca

2+ and

other ions into surface waters.